The Spyder Kitzbuhel jacket uses Spylon+ and Dermizax EV. It also has 60g of Thinsulate Supreme with X-Static silver fibres and 100g of Thinsulate Flex at the elbow. GLOSSARY: XT.L ultra-thin, lightweight and durable membrane. Exceptionally waterproof and breathable. Spylon A DWR (Durable Water Repellent) finish on the fabric exterior prevents it absorbing surface moisture. Has a DWR of 80% after 20 washes and guards against water and oil-based stains. Spylon+ As Spylon with a DWR of 80% after 50 washes. Dermizax EV offers intense waterproof protection. A smart non-porous membrane provides outstanding breathability. Thinsulate Supreme has a special fibre coating for a soft, luxurious feel. Great when damp and very breathable. Thinsulate Flex â€“ offers stretch and warmth without bulk, and recovers without wrinkling or tearing. X-static silver-coated textile fibre with natural anti-odour, anti-static and thermodynamic properties.